511 keV

That is interesting, haven't seen it before with other PSU's I've used. Thank you for explaining it. The PSU is now installed and all is well :)

Ah, ok. Thank you :)

I just purchased Corsair RM650x v2 CPU. I have a question that may be very stupid, so pardon me: It was provided with 4 screws, but only 3 of them seem to be usable. One screw hole is blocked. When I try with a toothpick there is something obstructing it, seems like plastic or something. https://imgur.com/a/19qck2j Just like in this pic I found. Yet on some other pics of the same PSU it doesn't seem to be like this. I definitely can't insert the 4th screw for more than 1-2 mm before it gets blocked. So, is that plastic supposed to be there, is it supposed to "slide" away when I screw it, or do I dare to try in case I break something? Never had this with any other PSU before, just wondering.